<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<html>
<head>
    <title>商品销售统计系统</title>
    <link rel="shortcut icon" href="背景3.jpg" type="image/gif" />
    <script language="javascript">
        /* 函数定义 */
        function check() {
            if (showye.accountNumber.value == "") {
                window.alert("账号不能为空!");
            }
            else if (showye.passWd.value == "") {
                window.alert("密码不能为空!");
            }
            else {
                showye.action="<%=request.getContextPath()%>main";
                showye.submit();
            }
        }
        /* 函数调用 */
    </script>
    <style type="text/css">
        body {
            background: url(背景7.jpg) no-repeat center center fixed;
            background-size: cover;
            min-height: 100vh;
            box-sizing: border-box;
            margin: 0;
            padding-top: calc(50vh - 6em);
            font: 150%/1.6 Baskerville, Palatino, serif;
        }

        .description{
            position: relative;
            margin: 0 auto;
            padding: 1em;
            max-width: 23em;
            background: hsla(0,0%,100%,.25) border-box;
            overflow: hidden;
            border-radius: .3em;
            box-shadow: 0 0 0 1px hsla(0,0%,100%,.3) inset,
            0 .5em 1em rgba(0, 0, 0, 0.6);
            text-shadow: 0 1px 1px hsla(0,0%,100%,.3);
        }

        .description::before{
            content: '';
            position: absolute;
            top: 0; right: 0; bottom: 0; left: 0;
            margin: -30px;
            z-index: -1;
            -webkit-filter: blur(20px);
            filter: blur(20px);
        }
    </style>
</head>
<center>
<body>

<h2>用户登录</h2>
<!--表单提交目标链接和方法post-->

<form method="post" id="showye">
    <p class="description">
    <table>
        <tr>
            <td>账号</td>
            <td><input type="text" name="accountNumber"/></td>
        </tr>
        <tr></tr><tr></tr><tr></tr>
        <tr>
            <td>密码</td>
            <td><input type="text" name="passWd"/></td>
        </tr>
        <tr></tr><tr></tr><tr></tr>
    </table>
    <table>
        <tr>
            <td><input type="submit" value="登录" onclick="check()"/></td>
            <td><input type="reset" value="重置"/></td>
        </tr>
    </table>
    </p>
</form>

</body>
</center>
</html>
